Heavy Metals Found in Popular Cat Foods, New Study Reports

By Coastal Carolina News Staff Writer

A study analyzing 100 cat food products across 62 popular brands detected lead in 99%, cadmium in 96%, and arsenic in 94% of tested items. The research evaluated kibble, wet foods, freeze-dried, and air-dried products from national and specialty brands—including Purina, Iams, Hill’s Science Diet, Blue Buffalo, and Fancy Feast—testing for over 122 environmental and industrial contaminants.

Testing was designed to compare relative contaminant levels across the market rather than determine if a specific product is immediately unsafe. However, clear variations emerged across formats and protein sources:

• Format: On a calorie-adjusted basis, dry kibble contained roughly three times more lead than wet or air-dried options.

• Proteins: Seafood-based diets contained significantly higher mercury levels compared to other animal proteins.

• Packaging: The plasticizer DEHP was detected in 48 of the 100 products, appearing in higher concentrations in canned and pouched foods.

Industry representatives pushed back on the findings, arguing the testing relied on non-regulatory standards and evaluated only a single batch per product. The pet food industry maintains that trace detection of naturally occurring elements does not inherently indicate a safety hazard and notes that products remain subject to government oversight.

While there are no recalls or major lawsuits linked to the testing, researchers urged attention to long-term chronic exposure, pointing to potential links with common feline conditions like chronic kidney disease. Concerned pet owners are advised to vary protein sources and consult a veterinarian before altering their pet’s diet.

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